Bathtub foot scrubber



FIG. 1 is a top, front, and side perspective view of a bathtub foot scrubber showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 3 is a front elevational view thereof, the rear being a mirror image;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for a bathtub foot scrubber, as shown and described. 